diff mbox series

[v2,6/6] staging:iio:ad2s90: Check channel type at read_raw

Message ID 20181027020005.3140-7-matheus.bernardino@usp.br (mailing list archive)
State New, archived
Headers show
Series staging:iio:ad2s90: Add scale info and improve error handling | expand

Commit Message

Matheus Tavares Oct. 27, 2018, 2 a.m. UTC 
This patch adds a channel type check at the beginning of the
ad2s90_read_raw function. Since ad2s90 has only one channel, it just
checks if the given channel is the expected one and if not, return
-EINVAL.

Signed-off-by: Matheus Tavares <matheus.bernardino@usp.br>
---
 drivers/staging/iio/resolver/ad2s90.c | 3 +++
 1 file changed, 3 insertions(+)
diff mbox series

Patch

diff --git a/drivers/staging/iio/resolver/ad2s90.c b/drivers/staging/iio/resolver/ad2s90.c
index 52b656875ed1..24002042a5c5 100644
--- a/drivers/staging/iio/resolver/ad2s90.c
+++ b/drivers/staging/iio/resolver/ad2s90.c
@@ -34,6 +34,9 @@  static int ad2s90_read_raw(struct iio_dev *indio_dev,
 	int ret;
 	struct ad2s90_state *st = iio_priv(indio_dev);
 
+	if (chan->type != IIO_ANGL)
+		return -EINVAL;
+
 	switch (m) {
 	case IIO_CHAN_INFO_SCALE:
 		/* 2 * Pi / (2^12 - 1) ~= 0.001534355 */